Burner head



Patented Oct. 7, 1941 -Martin FL Leiby, Quakerstown, Pal, assignor of 1 one-half ,toCalvin B. EnglerpCoopersbur-g, Pa.

" Application'May 1 0, 1940; Serial Nc. 33 4,435

to the coal bed inamanner such that proper combustion is made possible in burning such types of coal and economy of fuel consumption obtained, togetherwi-th maximum heating effi Another object is to provide a burner head forthe-purpose's above set forth which is proof against burning out; is easy to install-in practically any type of furnace, hot airfhot water,

pipeless, etc., is adaptedto obviate formation of clinkers, and is inexpensive to install, service and manufacture. r

Other and subordinate objects are also come prehended by my invention all of which, together with the precise nature of my improvement, will be readily understood when the succeeding description and claim are read with reference to the drawings accompanying and forming part of this specification.

In said drawings:

Figure 1 is a view in side elevation of a preferred embodiment of my burner head,

Figure 2 is a view in top plan,

Figure 3 is a transverse vertical section taken on the line 3-3 of Figure 2, and

Figure 4 is a fragmentary View in vertical transverse section taken through the water (01. ice-374x chamber, partition, and top plate, and drawn to 1 an enlarged scale.

Referring to the drawings by numerals, the head of my invention, in the illustrated embodiment thereof, comprises a drum-like, cylindrical, body part I adapted to be arranged in a furnace, not shown, in the usual manner, in the combustion chamber thereof and divided by a horizontally disposed diametrical partition 2 into a pair of upper and lower water and air chambers 3, 4, respectively. The top of the body part I is fiat and provides a bed plate 5 for the fuel and has depending axially therefrom an upwardly flaring flue 6 for the feed of fuel, and air, upwardly therethrough to thebed of fuel and by means presently described. The lower end of the flue 6 registers with an opening '1 in the partition 2 and a water and air seal is formed in any suitable manner between the lower end of said flue and said partition. The bed plate 5 extends beyond the sides of the body part I in the form of a radial-flangqasat 8i, to"provi'de an ajsh ledgev as:wi1=1 presently more clearly appean.

A radially disposed air inlet conduit 9" extends fromth'e body part. I below the partition 2 which" is designedtobe connected to asuita'bleisource of air under pressurea's; for instanceja fan; not

shown; whereby such air is forced into the air chamber 4. A Water inlet pipe ID is extended from oneside of the bodypart I. adjacent the top therecf,-and a similar discharge pipe: H from the other side of said body part ladiacent the bottom off'the water chamber 3; are designed for connection to any'fsuitable source of water supply, nots-howmso that a, circulation is set u-pthrough-the chamber 3,:the type of supply source, aswillflbe understood, differing with the-type of furnacd or' heating plant.

' Extending horizontally into the conduits; in

spaced relation thereto, is a smaller diameter stoker conduit [2 having" an upwardly" curved inner outlet end l3 sealed to the partition 2 around the opening 7 to communicate with the lower end of the flue 6. The outer end of the conduit I2 is designed to be suitably connected to a feed hopper, or coal bin, not shown, in any usual manner. The usual helical or Worm type conveyor unit I3 is provided in the conduit I2 for rotation to feed coal through the same and upwardly through the flue 6 to spread out over the bed plate 5. The conveyor unit l3 may be driven by any desired means.

Extending vertically between the partition 2 and bed plate 5 within the confines of the sides of the water chamber 3 are small air tubes l4 having flange ends l5 partition and plate and with the flanges countersunk therein, said tubes being secured in said partition and plate in any desired manner to form a water tight seal around said ends thereof. The tubes l4 are arranged in circular series with those in alternate series staggered relative to those in intervening series. Also arising from partition 2, contiguous flue B are tWo circular series of air tubes [6, similar to tubes H! but having their upper ends extending into the side of the flue 6 at different levels to feed air into said flue. The upper ends of the tubes I4, I6, have threaded therein ported nozzle plugs 11 forming restricted outlets at said ends of said .tubes.

The described body part I may be formed in any suitable manner for instance, in upper and extending through said scribed head, the coal is fed by the stoker conveyor l3 through stoker conduit l2 upwardly through flue 6 to flow over the top of said flue and spread out on the bed plate 5. Water under pressure is admitted to the water chamber 3 to fill the same and maintain a slow circulation therethrough. Air under pressure is admitted to air chamber 4 by way of fiue I2 to let out of tubes [4 into the bed of coal and out oftubes I6 into the flue 6 to provide for proper combustion. The water in chamber 3 soon becomes heated to a warm temperature by the burning fuel on bed plate 5 and heats tubes l4, [6, thereby heating air passing through the latter so that warm air is injected into the bed of fuel and combustion chamber and also into the supply in flue 6. This further facilitates combustion reass ss viding the same into upper and lower water and also augments the supply of heat emanating from the bed of coal. As will be understood, the warm water keeps the temperatur of the tubes l4, it down likewise that of body part I, thereby preventing the device from burning out. By restricting the outlet ends of tubes I4, IS, in the manner described, the air in the tubes is caused to bank up therein and become uniformly and quickly heated. The tubes l4, it, are spaced together closer toward the flue 6 so that they are increased in number near said flue. Thus the supply of warm air injected into the fuel is greater around the flue 6 or at the center of the bed of fuel, and decreases in volume outwardly from the area of greater supply. The result is that combustion starts around the flue B and as the coal spreads outwardly it is completely burned and forms an ash ring spilling over the edge of ash ledge or flange 8.

The foregoing will, it is believed, suffice to impart a clear understanding of my invention without further explanation.

Manifestly the invention, as described, is susceptible of modification without departing from the inventive concept and right is herein reserved to such modifications as fall within the scope of the subjoined claim.

Having thus described the invention, what I claim is:

A heater head for use in the combustion chamber of a furnace comprising a drum-like casing having a fiat top forming a bed plate for fuel and provided with an axial aperture therein for the feed of fuel upwardly therethrough to said plate, a diametrical partition in said casing an air chambers, respectively, an air inlet conduit extending into one side of the casing for introducing air under pressure into said air chamber, a fuel feed conduit extending into said air chamber by way of the air inlet conduit and havin an inner upper end extending upwardly through said partition and communicating with the aperture in said plate, stoker means in said fuel feed conduit for forcing fuel along the same and upwardly therethrough to said aperture, a pair of water inlet and outlet pipes connected to said casing for circulating water through said water chamber, flue pipes extending between said partition and plate through said water chamber and opening into said air chamber and onto saidplate to introduce air under pressure to the bed of fuel and to be cooled by the water in said chamber, and flue pipes extending from said partition to the upper end of said fuel feed conduit and opening into said air chamber and upper end of the feed conduit to convey air from said 1 air chamber to fuel below said bed plate, said flue pipes being arranged in circular series around said upper end of the fuel feed conduit and increasing in number inwardly toward said upper end.

MAR/TIN F, LEIBY. 

